1 files changed, 54 insertions, 0 deletions
diff --git a/deps/rabbitmq_federation/src/rabbit_federation_event.erl b/deps/rabbitmq_federation/src/rabbit_federation_event.erl
new file mode 100644
index 0000000000..417b8ecba3
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+++ b/deps/rabbitmq_federation/src/rabbit_federation_event.erl
@@ -0,0 +1,54 @@
+%% This Source Code Form is subject to the terms of the Mozilla Public
+%% License, v. 2.0. If a copy of the MPL was not distributed with this
+%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
+%%
+%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates.  All rights reserved.
+%%
+
+-module(rabbit_federation_event).
+-behaviour(gen_event).
+
+-include_lib("rabbit_common/include/rabbit.hrl").
+
+-export([add_handler/0, remove_handler/0]).
+
+-export([init/1, handle_call/2, handle_event/2, handle_info/2,
+         terminate/2, code_change/3]).
+
+-import(rabbit_misc, [pget/2]).
+
+%%----------------------------------------------------------------------------
+
+add_handler() ->
+    gen_event:add_handler(rabbit_event, ?MODULE, []).
+
+remove_handler() ->
+    gen_event:delete_handler(rabbit_event, ?MODULE, []).
+
+init([]) ->
+    {ok, []}.
+
+handle_call(_Request, State) ->
+    {ok, not_understood, State}.
+
+handle_event(#event{type  = parameter_set,
+                    props = Props0}, State) ->
+    Props = rabbit_data_coercion:to_list(Props0),
+    case {pget(component, Props), pget(name, Props)} of
+        {global, cluster_name} ->
+            rabbit_federation_parameters:adjust(everything);
+        _ ->
+            ok
+    end,
+    {ok, State};
+handle_event(_Event, State) ->
+    {ok, State}.
+
+handle_info(_Info, State) ->
+    {ok, State}.
+
+terminate(_Arg, _State) ->
+    ok.
+
+code_change(_OldVsn, State, _Extra) ->
+    {ok, State}.